[SCSI] zfcp: provide support for NPIV

N_Port ID Virtualization (NPIV) allows a single FCP port to appear as
multiple, distinct ports providing separate port identification. NPIV
is supported by FC HBAs on System z9. zfcp was adapted to support this
new feature.

Signed-off-by: Andreas Herrmann <aherrman@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 10 insertions, 1 deletions

diff --git a/drivers/s390/scsi/zfcp_dbf.c b/drivers/s390/scsi/zfcp_dbf.c
index fff1537335c7..64d9b90373fe 100644
--- a/drivers/s390/scsi/zfcp_dbf.c
+++ b/drivers/s390/scsi/zfcp_dbf.c
@@ -279,9 +279,18 @@ zfcp_hba_dbf_event_fsf_unsol(const char *tag, struct zfcp_adapter *adapter,
                         break;
 
                 case FSF_STATUS_READ_LINK_DOWN:
-                        rec->type.status.payload_size = sizeof(u64);
+                        switch (status_buffer->status_subtype) {
+                        case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
+                        case FSF_STATUS_READ_SUB_FDISC_FAILED:
+                                rec->type.status.payload_size =
+                                        sizeof(struct fsf_link_down_info);
+                        }
                         break;
 
+                case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
+                        rec->type.status.payload_size =
+                            ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT;
+                        break;
                 }
                 memcpy(&rec->type.status.payload,
                        &status_buffer->payload, rec->type.status.payload_size);